Police said the eight were family members and the accident happened when the matatu they were traveling in rolled in Kianugu area.
They were coming from a burial in Muranga when the driver of the bus they were in lost its control before it rolled. Police said five other passengers were injured in the accident.
The bodies of the deceased were preserved at the Nyahururu hospital mortuary awaiting postmortem while the motor vehicle towed to station and detained awaiting inspection.
In other news, a night guard was this morning shot dead in a robbery on Lower Kabete Road in Nairobi. The guard was on duty when a gang struck at a private residence.
Police say he tried to resist which prompted the gang to shoot him in the chest. He died on the spot. Police say the gang escaped with unknown amount of money and other valuables.
-Cyrus Ombati